Process for Provisioning a Cable Modem

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The cable modem:

• Scans and locks on the RF data channel in the downstream

• Gets info on how to communicate in the upstream path

• Establishes terminations for Layer 1 and 2 communications

• Requests an IP address from a DHCP server

• Requests a DOCSIS configuration file from a TFTP server

• Registers any QoS

• Enables the PC-based network initialization

© 2004 Cisco Systems, Inc. All rights reserved. BCRAN v2.1—4-14

The cable modem:

• Scans and locks on the RF data channel in the downstream

• Gets info on how to communicate in the upstream path

• Establishes terminations for Layer 1 and 2 communications

• Requests an IP address from a DHCP server

• Requests a DOCSIS configuration file from a TFTP server

• Registers any QoS

• Enables the PC-based network initialization

© 2004 Cisco Systems, Inc. All rights reserved. BCRAN v2.1—4-14

There are several steps for provisioning a cable modem to operate with a host system for

Internet services to provide Cisco Architecture for Voice, Video and Integrated Data (Cisco

AVVID) content.

Cable modems are designed and coded to perform these specific DOCSIS-defined steps in the initialization and registration sequence:

Step 1 The cable modem powering up must scan and lock on the RF data channel in the downstream path.

Step 2 The modem must read specific maintenance messages in the downstream path that inform it how, where, and when to communicate in the upstream path.

Step 3 The modem communicates with the CMTS to establish Layer 1 and 2 communications.

Step 4 The cable modem then requests an IP address and core configuration information from a Dynamic Host Configuration Protocol (DHCP) server. DHCP servers must support RFC 2131 to provide IP addresses to the cable modem.

Step 5 The modem requests a DOCSIS configuration file from a TFTP server. DOCSIS

configuration files are ASCII files created by special DOCSIS editors. To handle the request of the modem, the TFTP server must support RFC 1350.

Step 6 The cable modem registers with the CMTS, negotiating and ensuring any QoS.

Step 7 After the cable modem initiation has completed, the PC downstream from the cable modem can request its own IP address from a DHCP server.

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